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July 12th, 2026 :: 7:58 am CDT   

Local Weather Report for
Decatur
Illinois, United States

 Current Decatur Weather Conditions Updated July 12th at 6:54 am 
mist
Temperature:68°F Dew Point:66°F
Barometer:30.12 inHg Wind:N 15 Mph
Humidity:94.0% Visibility:0M
 
 Decatur Weather Forecast Summary  
 
Today
Jul 12th
Monday
Jul 13th
Tuesday
Jul 14th
Wednesday
Jul 15th
Thursday
Jul 16th
Sunny Sunny Mostly Sunny Sunny Mostly Sunny
81°F
81°F
65°F
84°F
65°F
86°F
69°F
86°F
72°F
 
 Decatur Detailed Weather Forecast  
 
Sunday, July 12th, 2026
Morning Temperature: 71°F
Sunny. Windy at times.
Afternoon Temperature: 80°F
Sunny. Chance of a thunderstorm. Windy at times.
Evening Temperature: 72°F
Clear. Chance of a thunderstorm.
Monday, July 13th, 2026
Overnight Temperature: 65°F
Clear.
Morning Temperature: 70°F
Sunny.
Afternoon Temperature: 81°F
Sunny. Chance of a thunderstorm. Windy at times.
Evening Temperature: 74°F
Clear. Chance of a thunderstorm.
Tuesday, July 14th, 2026
Overnight Temperature: 66°F
Clear.
Morning Temperature: 72°F
Sunny.
Afternoon Temperature: 83°F
Sunny. Slight chance of a thunderstorm.
Evening Temperature: 77°F
Mostly clear. Chance of a thunderstorm.
Wednesday, July 15th, 2026
Overnight Temperature: 70°F
Clear.
Morning Temperature: 76°F
Sunny. Chance of a thunderstorm.
Afternoon Temperature: 85°F
Sunny. Chance of a thunderstorm.
Evening Temperature: 80°F
Clear. Chance of a thunderstorm.
Thursday, July 16th, 2026
Overnight Temperature: 72°F
Clear. Slight chance of a thunderstorm.
Morning Temperature: 77°F
Sunny. Chance of a thunderstorm.
Afternoon Temperature: 85°F
Sunny with cloudy periods with a slight chance of showers or thundershowers.
Evening Temperature: 79°F
Clear with a slight chance of showers or thundershowers.
Friday, July 17th, 2026
Overnight Temperature: 74°F
Mostly clear. Chance of a thunderstorm.
Morning Temperature: 77°F
Mostly sunny with a slight chance of showers or thundershowers.
Afternoon Temperature: 86°F
Sunny with a chance of showers or thundershowers. Windy at times.
Evening Temperature: 81°F
Mostly clear. Chance of a thunderstorm. Windy at times.
Saturday, July 18th, 2026
Overnight Temperature: 76°F
Clear. Slight chance of a thunderstorm. Windy at times.
Morning Temperature: 76°F
A mix of cloud and sun. Chance of a thunderstorm. Windy at times.
Afternoon Temperature: 83°F
Sunny with cloudy periods. Chance of a thunderstorm. Windy at times.
Evening Temperature: 73°F
Clear. Chance of a thunderstorm. Windy at times.
Sunday, July 19th, 2026
Overnight Temperature: 66°F
Clear. Slight chance of a thunderstorm.
Morning Temperature: 68°F
Sunny. Windy at times.
Afternoon Temperature: 77°F
Mostly sunny. Windy at times.
Evening Temperature: 70°F
Clear with cloudy periods.
Monday, July 20th, 2026
Overnight Temperature: 62°F
Clear with cloudy periods.
Morning Temperature: 69°F
Sunny with cloudy periods.
Afternoon Temperature: 78°F
A mix of cloud and sun.
Evening Temperature: 71°F
Clear. Chance of a thunderstorm.





 

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This WeatherCity Weather Forecast for Decatur, Illinois, United States is computed using a computer-generated forecast model and should be considered experimental. Please confirm this weather information with your official weather information office

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